Stable A good friend literally lathe sphere tool Andrew Halliday Blue masterpiece
Vermec Sphere Jig
Wooden Ball Lathe Combination Tool Set Wood Threading Jig Sphere Jig Combo Woodturning - Wood Based Panels Machinery - AliExpress
scrap wood city: How to make a DIY sphere making jig for the lathe
Small Ball and Radius Turning Tool - Designed to Cut Round Shapes or Curves in Brass, Aluminum, Steel, Wood or Plastic on your Bench Top Metal Lathe, LittleMachineShop.com (2569) - Amazon.com